( -215 + 131 + 57 ) - ( 131 - 215 +47 )
= -215 + 131 + 57 - 131 + 215 - 47
= ( -215 + 215 ) + ( 131 - 131 ) + ( 57 - 47 )
= 0 + 0 + 10
=10
mk giải xong rồi nhớ tick mk nha
(-215+131+57) - (131 - 215 + 47 )
=141- (-37)
=178
(-215+131+57) - (131 - 215 + 47 )
=-215+131+57-131+215-47
=(-215+215)+(131-131)+(57-47)
=0+0+10
=10
tick mik đi
(-215+131+57)-(131-215+47
=-215+131+57-131+215-47
=(-215+215)+(131-131)+(57-47)
=0+0+10=10
(tích nha)
